As the state?s population booms, water ? or the lack of it ? is becoming an increasing problem in west Texas. Each drop is precious. On January 8, Texas and New Mexico are headed to the Supreme Court to give their oral arguments in a dispute over an 80-year-old compact involving water from the Rio Grande. Texas claims New Mexico hasn?t been handing over the state?s allocated share of water, leaving its residents and their pecan trees high and dry.